Pipe-bending machine.



o. o. RUTLBDGB. PIPE BENDING MAGHINE.

APPLICATION FILED IAN. 17, 1913. 1O79,442, Patented Nov. 25, 1913.

d l ATTORNEY u also inv'liffating 'entran srariis calmi; o. Romanen, or

AQLVORD, TEX 11S.

PIPE-BENDING MACHINE.

antenas,

pplication pled January 17', 1

a-eitizen' oix the United States, residing ati Ali/ord, in the county of Wise and State el" use# Pipe-Bending Ma-I exas, have invented certain new and ful' Ifiiiprovements in chilies, of which the following is aspeciti cation.

This invention' relates to new and usefulJ improvements in pipe bending machines.

rillli'e objects oliI the invention are; the provvision et' aV base sliaped'to-reeeive a recipropipe engaging? member at" its for-Ward end, said base also supporting pipe eatery rack bar hav-ing a pivotally and' adjustably fulcrum members disposed laterally of the raekz bar and havingv particularly coiistruetedl i in' which the pipe is: the bending or shaping" operating' provided with engaging the teeth oit the rack bar,- inounted on' the base' and engaging the teeth of the rack barg' pipe engaging devices` ulcrunied during' operation; the provision of' lever carried bythe base and a' o together with a pawl and the provision of' readily removable fasteiiings and' pivot supports' whereby the machine may be expeditiously taken apart in conveniently transported elements and readily and easily assembled without loss of time.

A- st'ill further object of the' invention is to Provide' a' device of the character described that will be strong, durable, elliA cient and simple and comparatively ine);4 pensive to construct; 'also one in which the several parts will not be likely to get outot working order.

lWith these and various other obje( in view the invention has relation to certain novel features ol construction and operation,y an example of which is desoribed in the following .iweitiration and illustrated in the afafoinpanying drawings, wherein:

Figure l is a plan View of the ii'iarhine,

in dotted lines, positions to whieli the t'nlci'uin members may be swung. Fig. is a side elevation of the same, and ig. 3 a rear olevatioi'i of the machine.

ln the. drawings the numeral l designates a transverse base of heavy eonstrurtion having a central rectangular opening 2 and at each side inwardly extending bearing remisses 3. An elongated rar-li bar et passes through the opening 2 and is provided with a ap f its upper side. ne lin-ward end oil the veel' bar is reduf'od Specification of Letters apertures 8 may be brought vwith the Patent. Patented Nov. 25, 1 913. 913. Serial No. 742,531.

in thickness and provided with a segmental jaw G to which is hinged a segmental keeper 7. The keeper has .t plurality of apertures S arranged to register with an apei'tui'eQ- in the outerlend ot the jaw. Any of the into register aperture and a pin l0 passed therethrough thus fastening the jaw and keeper together. Pipes of various diam-` eters may thus be held.

In each recess 3 a fulcrum member 1l. is Each liileruni member comprises a bar pivoted in the recess on a vertical headed pin 14; inserted in the base 1 and passing through one of a serios ot apertures l in the barthe latter serving to adjust the bar longitudinally. The forward end of each har is bitnrcat'ed and .receives the ear 16 of a segmental jaw 17, said ear being pivot'ed on aA headed pin 18 passing vertieally through the i'urcations Each jaw may be swung laterally. To each jaw a lsegmental keeper 18 is pivoted similar to the keeper 7 and ylikewise apertures 19` and E2() and a pin 21 are provided, whereby said keeper 18 may be adjustably' fastened to its corresponding jaw. It will be noted that' each jaw 17 and its keeper 18 are beveled as shown in Figs. 1 and Q, which beveled portions extend relatively away vl'roni the jaw G of the rank bar which is disposed eontraiiy ot' the fulorum members. These hei'kled or inclined faces serve to lifetter grip .e pipe and conform to the contour thereof as the same is shaped.- A

lt will be noted that the ulerum ii'iembers, owing to their hinged joints may be swung into various positions relative to the rack bar as indicated in Fig. 1, thereby'permitting various shapes to be formed. Also by adjusting one fulorum member in advance of the other the pipe may be irregularly bent or a compound curvo produced.

lt is to be understood that in operating the. machine the pipe in some instances must be fastened against longitudinal displacement by any suitable means (not shown) and it may also be necessary to fix the machine in place by any suitable means (not shown`). When the fulerum members are in the position shown in dotted lines iii Fig. 1 and the rack bar 'is moved outward, said members will tend to straighten but'I their jaws will bind ou the pipe and the relative positions with regard to the jaw G will not of the bar.

and supports,

, the pipe in an irregular curve.

change sufficiently to defeat the bending of It is apparent that by adjusting lthe members 11 one in advance ofthe other through the agency of the pins 14 and the apertures 15, bends of various curvature may be had.

For propelling the rack bar 4 and shaping or bending1 the pipe, a hand lever 22is pivoted on a ieaded pin 23 passed transversely therethrough and supported in the rear ends of arms 24 .extending `from the top of the base 1 to which they are bolted. The lower end of the lever is bifurcated and pivotally receives a dog 25 engaging the teeth 5 of the rack bar. By swinging the lever the rack bar is driven forward and vretained by a pawl 26 pivoted on the forward side of the base and engaging the rack teeth. Flexible connections 27 and 28 respectively are attached to the dog and thc pawl and secured as shown. vThe dog and pawl may be conveniently raised by these connections when it is desired to move the rack bar rearward.

When it is desired to shape a pipe the fulcrum members 11 are swung and adjusted to the position deemed necessary to produce the desired shape and the keepers 1 7 andlS swung sothat the pipe may be placed' in the jaws 6 and 17, the rack bar 4 having previously been moved to the proper position. After the keepers are adjusted and fastened, the hand lever 22 is swung whereby the rack bar 4 is moved forward. The jaws 17 form fixed fulcrum points on which the pipe is fulcrumed as it` is bent'by the forward movement of the bar 4. In this way the desired shape is produced.

This machine is more especially adapted for shaping pipes of large diameters such as are used for oiland water wells, but it may be used for bending various sizes of pipes and lother objects.

The parts of the machine are made comparatively heavy to stand the strain and rough usage.

Headed pins and removable fastenings as specified are employed so that the machine may be expeditlously and easily taken apart and assembled incidental to its transportation from place to place.

What I claim is:

1. In a pipe shaping machine, a base, a shaping member movable longitudinally on the base, a pipe receiving member mounted' on the forward end of the said member,

fulcrum members pivoted on the base, fulcrum jaws hinged on the forward ends of the fulcrum members, and keepers hinged and fastened to the fulcrum jaws, said jaws and keepers having beveled pipe rey ceiving faces.

2. In a pipe shaping machine, a base, a

rack bar slidable longitudinally, a hand operating lever having a dogoengaging in the teeth of the rack bar, a jaw fixed on the forward -end of the rack bar, a keeper hinged to the jaw, fulcrum bars pivoted at each side of the base and between which the ears hinged in the forward ends of the fulcrum bars, and keepers-hinged on the fulcrum jaws.

3. In a pi e shaping machine, a base, a rack bar slidable longitudinally, a hand operating lever having a dog engaging in the teeth of the rack bar, a jaw fixed on the forward end of the rack bar, a' keeper hinged to the jaw, fulcrum bars pivoted at each side of the base and between which the rackbar is disposed, fulcrum jaws having ears hinged in the forward rends of the ful- 470 rack bar is disposed, fulcrum jaws having j 

